A double replacement reaction is a reaction in which one element replaces a similar element within a compound. (2 points) True
False

Q1: Sodium metal reacts with water to produce hydrogen gas.

What best describes this reaction?

A: A single replacement reaction takes place because sodium is more reactive than hydrogen.

Q2:When Pb and AlCl3 react together, lead (Pb) can replace aluminum (Al) in the compound because lead is lower on the activity series.

A: False

Q3:When HNO3 and Au are mixed together, what do you expect to happen, and why?

A:No reaction, because Au is lower on the activity series and cannot replace H

Q4:Which of the following is a double replacement reaction?

A:Ca(OH)2 + H2SO4 → CaSO4 + 2H2O

Q5:The table shows the nature of reactants and products formed in a certain type of chemical reaction.

Nature of Reactants and Products

ReactantsProducts

Nonmetal + Ionic compoundNonmetal + Ionic compound

Which of the following is true about the type of chemical reaction?

A:It is a single replacement reaction, and the anions in the two ionic compounds are different.

Q6:A double replacement reaction is a reaction in which one element replaces a similar element within a compound.

A: False

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."